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Tlak. [Pa = N m -2 ]. 1bar = 10 5 Pa. Hidrostatski tlak. p =  gh. Hidrostatski paradoks. F h. F. F v. F v. F. F h. A. A. A. Zadatak: Neka sisaljka podiže vodu na visinu 45 m. Kolikom silom djeluje sisaljka na otvor ventila, ako je njegova površina 8 cm 2 ?. Rješenje:.

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Tlak

[Pa = N m-2]

1bar = 105 Pa

Hidrostatski tlak

p = gh


Hidrostatski paradoks

Fh

F

Fv

Fv

F

Fh

A

A

A


Zadatak: Neka sisaljka podiže vodu na visinu 45 m. Kolikom

silom djeluje sisaljka na otvor ventila, ako je njegova površina

8 cm2?

Rješenje:

h = 45 m

A = 8 cm2

= 0,0008 m2

F = ?

, p = gh

F = ghA

= 1000 kg m-39,81 m s-245 m 0,0008 m2

F = 353 N


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